Here's a tip:

1. Sign up for multiple accounts since it's free.

2. Follow them on Twitter and link your account.

3. Invite only two people.

I just achieved Rare II on my second account. 👍 Please note that this offer will end in four days.

Share your referral links below for others to utilize:

1. https://grvt.io/exchange/sign-up?ref=LRJHD0T

2. https://grvt.io/exchange/sign-up?ref=HNUY9NO